Comment on changes in sex ratio in neural tube defects since food fortification with folic acid: re "hypothesis: the female excess in cranial neural tube defects reflects an epigenetic drag of the inactivating X chromosome on the molecular mechanisms of neural tube fold elevation"
Birth Defects Res A Clin Mol Teratol. 2012 Nov;94(11):958.
doi: 10.1002/bdra.23090.
Epub 2012 Nov 2.